Stapler



FIG. 1 is a perspective view of a stapler;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left elevation view thereof;

FIG. 5 is a right elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the stapler which form no part of the claimed design. 

CLAIM The ornamental design for the stapler, as shown and described. 